&: Offset and/or length specification exceeds the field length

What causes this issue?

You have used a decision operation with offset and/or length value(s).
You have exceeded the length of the field addressed with the decision
operation.
Example:
As an example, let us use the field 'STADT' with a defined length of
8 characters. The decision operation would be:
DSTADT(10) or DSTADT+7(5)
Both operations are incorrect: In the first case, a length of 10
characters is queried; in the second case, the combination of
'+7(5)' exceeds the defined length of 8.

How to fix this error?

Check the length of the field for the decision operation in the
Data Dictionary and correct your entry.

Error message extract from SAP system. Copyright SAP SE.